CN116854917A - Modified hydrogen-containing MQ silicone resin reinforced adhesion accelerator and its preparation method and application - Google Patents

Abstract

The invention belongs to the technical field of organic silicon, and particularly discloses a modified hydrogen-containing MQ silicone resin reinforced adhesion promoter, and a preparation method and application thereof. The preparation method of the adhesion promoter comprises the following steps: mixing acrylic monomers with a solvent and a polymerization inhibitor to obtain a monomer solution; mixing hydrogen-containing MQ silicon resin with a solvent and a catalyst to obtain a hydrogen-containing MQ silicon resin mixed solution; dropwise adding the monomer solution into the mixed solution of the hydrogen-containing MQ silicon resin, and heating to react; cooling, adding adsorbent to adsorb catalyst, filtering, and removing solvent. The invention utilizes a large number of silicon-hydrogen bonds in the hydrogen-containing MQ resin to modify the hydrogen-containing MQ resin, so that the surface of the hydrogen-containing MQ resin is provided with a large number of polar functional groups, and the bonding performance between the hydrogen-containing MQ resin and a polar substrate is improved. Meanwhile, partial silicon-hydrogen bond in the hydrogen-containing MQ resin is reserved, so that the hydrogen-containing MQ resin can react with vinyl polydimethylsiloxane in the system, and the overall mechanical property is improved.

Description

Modified hydrogen-containing MQ silicone resin reinforced adhesion accelerator and its preparation method and application

Technical field

The invention belongs to the technical field of organic silicon, and specifically relates to a modified hydrogen-containing MQ silicone resin-reinforced adhesion accelerator and its preparation method and application.

Background technique

MQ silicone resin is a silicone resin composed of monofunctional Si-O units (M units) and tetrafunctional Si-O units (Q units). Hydrogen-containing MQ silicone resin is prepared through the condensation of tetramethyldihydrogendisiloxane and ethyl orthosilicate. It is a cross-linked semi-inorganic polymer with a highly cross-linked structure.

Addition liquid silicone rubber is a kind of vinyl polydimethylsiloxane (vinyl silicone oil) as the base polymer, hydrogen-containing polysiloxane (hydrogen-containing silicone oil) as the cross-linking agent, supplemented by catalysts and fillers Silicone elastomer prepared by etc. Due to its excellent hydrophobicity, thermal stability and corrosion resistance, it is widely used in electronic devices, material packaging, aerospace and other aspects. However, the main chain of addition-type liquid silicone rubber is alternately arranged with silicon and oxygen, and the side groups are mostly non-polar groups, making it highly non-polar as a whole and having poor adhesion to polar substrates such as metals, thus limiting its use. its further applications.

Therefore, there is an urgent need to modify hydrogen-containing MQ resin to improve its bonding performance with polar substrates and thereby improve the mechanical properties of addition liquid silicone rubber.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a modified hydrogen-containing MQ silicone resin reinforced adhesion accelerator and its preparation method and application. The adhesion accelerator modifies a large number of silicon-hydrogen bonds in the hydrogen-containing MQ resin, so that Its surface contains a large number of polar functional groups, which improves its bonding performance with polar substrates. At the same time, by retaining part of the silicon-hydrogen bonds in the hydrogen-containing MQ resin, it can react with the vinyl polydimethylsiloxane in the system and serve as a cross-linking agent to replace part of the hydrogen-containing silicone oil. By increasing the reaction sites Increase the cross-linking density, thereby better dispersing the stress and improving the overall mechanical properties.

The inventive concept of the present invention is to utilize a large number of silicon-hydrogen bonds in the hydrogen-containing MQ resin to react the double bonds in the acrylic monomer with part of the silicon-hydrogen bonds through a hydrosilylation reaction, thereby converting the acrylic monomer into The polar functional groups contained in the resin are grafted into the hydrogen-containing MQ resin; and the acrylic monomer itself has a certain bonding strength to modify the hydrogen-containing MQ resin so that it has a certain bond with the polar substrate. strength. At the same time, some silicon-hydrogen bonds in the hydrogen-containing MQ resin are retained. By compounding into liquid silicone rubber, the silicon-hydrogen bonds contained in it can react and cross-link with the vinyl groups of the vinyl silicone oil in the liquid silicone rubber, replacing part of the hydrogen-containing silicone oil. Then solidify to graft the above functional groups into silicone rubber. In addition, since hydrogen-containing silicone oil generally has only two silicon-hydrogen bonds in one molecule, hydrogen-containing MQ resin contains a large number of silicon-hydrogen bonds, which can increase the number of sites that react with double bonds, thereby increasing the cross-linking density.

In order to solve the above technical problems, a first aspect of the present invention provides a preparation method of an adhesion promoter, including the following steps:

Mix acrylic monomer with solvent and polymerization inhibitor to obtain monomer solution;

Mix hydrogen-containing MQ silicone resin with solvent and catalyst to obtain hydrogen-containing MQ silicone resin mixed solution;

The monomer solution is added dropwise into the hydrogen-containing MQ silicone resin mixed solution, and the temperature is raised to react; after cooling, an adsorbent is added to adsorb the catalyst, and after filtration, the solvent is removed to obtain the adhesion accelerator.

Specifically, during the preparation process of the adhesion promoter of the present invention, the chemical reaction process is as follows:

The double bonds contained in the acrylic monomer react with the silicon-hydrogen bonds in the hydrogen-containing MQ silicone resin under catalyst and heating conditions, and the polar functional groups in the acrylic monomer are grafted to the hydrogen-containing MQ in silicone. When the acrylic monomer is one type of monomer, the (Me ₂ RaSiO _0.5 ) _y structure is generated; when the acrylic monomer is two types of monomer, the (Me ₂ RaSiO _0.5 ) _y (Me ₂ RbSiO _0.5 ) _z structure, where: Me is a methyl group, the groups of Ra and Rb are determined by the types of acrylic monomers; the values of y and z are determined by the amount of acrylic monomers.

Preferably, the acrylic monomer is selected from the group consisting of hydroxyethyl acrylate, N-acryloylmorpholine, isobornyl acrylate, tetrahydrofuran acrylate, glycidyl acrylate, 3,4-epoxycyclohexyl methacrylate monomer. one or two of the species.

Preferably, the polymerization inhibitor is selected from at least one of p-hydroxyanisole, hydroquinone, p-tert-butylcatechol, and p-quinone; and/or the solvent is selected from toluene, isopropyl At least one of alcohol, cyclohexane, and ethyl acetate.

Preferably, the catalyst is a Karastedt catalyst.

Preferably, the concentration of the catalyst in the reaction system is 1-6 ppm.

Preferably, the adsorbent is activated carbon.

Preferably, the added amount of the adsorbent accounts for 5-15 wt% of the reaction system.

Preferably, the solvent removal method is rotary evaporation.

Preferably, the hydrogen content of the hydrogen-containing MQ silicone resin is 0.4-0.9%.

Preferably, the molar ratio of the hydrogen-containing MQ silicone resin to the acrylic monomer is 1: (0.3-0.8).

Preferably, the polymerization inhibitor accounts for 0.2-0.8% of the mass of the acrylic monomer.

Preferably, the acrylic monomer is mixed with a solvent and a polymerization inhibitor and stirred at room temperature for 20-40 minutes.

Preferably, the hydrogen-containing MQ silicone resin, solvent and catalyst are mixed at 30-50°C.

Preferably, the reaction temperature is 50-90°C.

Preferably, the reaction time is 1-6 hours.

Preferably, the adsorption time of the adsorbent is 1-2 hours.

A second aspect of the present invention provides an adhesion promoter, which is prepared by the above preparation method.

Preferably, the general chemical formula of the adhesion promoter is: (Me ₂ HSiO _0.5 ) _x (Me ₂ RaSiO _0.5 ) _y (Me ₂ RbSiO _0.5 ) _z (SiO ₂ ) _q , where: Me is methyl, Ra , Rb group is determined by the type of acrylic monomer; the ratio of x, y, z and q is determined by the amount of acrylic monomer.

Further preferably, the MQ value of the hydrogen-containing MQ silicone resin is 1, that is, (x+y+z)/q=1.

A third aspect of the present invention provides an addition-type liquid silicone rubber, the raw material components of which include the above-mentioned adhesion promoter.

Preferably, the raw material components also include vinyl silicone oil, hydrogen-containing silicone oil, fillers, inhibitors and Karastedt catalyst; the raw material components include by weight: 100 parts of vinyl silicone oil, 2-20 parts of hydrogen-containing silicone oil. , 5-50 parts of fillers, 0.2-5 parts of adhesion accelerator, 0.001-0.05 parts of inhibitors, and 0.05-0.5 parts of catalysts.

Preferably, the filler is white carbon black.

Preferably, the inhibitor is 1-ethynylcyclohexanol.

Preferably, the catalyst is a Karastedt catalyst.

A fourth aspect of the present invention provides a method for preparing addition-type liquid silicone rubber, which is used to prepare the above-mentioned addition-type liquid silicone rubber, including the following steps:

After mixing each raw material, degassing and solidifying, the addition liquid silicone rubber is obtained.

Specifically, during the preparation process of the addition-type liquid silicone rubber of the present invention, the vinyl groups of the vinyl silicone oil in the system and the silicon-hydrogen bonds in the adhesion promoter react and cross-link under the action of heating and catalysts, and the chemical reaction The process is as follows:

Preferably, vacuum degassing is used for 10-30 minutes.

Preferably, the curing temperature is 100-180°C.

Preferably, the curing time is 2-5 hours.

The above technical solution of the present invention has at least the following technical effects or advantages compared with the existing technology:

(1) During the preparation process of the adhesion accelerator of the present invention, the double bonds contained in the acrylic monomer react with the silicon hydrogen bonds in the hydrogen-containing MQ silicone resin under catalyst and heating conditions, and the acrylic acid The polar functional groups in the monomers are grafted into the hydrogen-containing MQ silicone resin; and the acrylic monomer itself has a certain bonding strength to modify the hydrogen-containing MQ resin so that it has a certain bonding strength with the polar groups. It improves the bonding strength of the material while retaining some of the silicon-hydrogen bonds in the hydrogen-containing MQ resin.

(2) In the present invention, the obtained adhesion accelerator is compounded into an addition-type liquid silicone rubber, and the silicon-hydrogen bonds contained in it can react and cross-link with the vinyl groups of the vinyl silicone oil in the liquid silicone rubber, replacing part of the Hydrogen silicone oil is then cured to graft the functional groups in the adhesion promoter into the silicone rubber. At the same time, because the hydrogen-containing MQ resin contains a large number of silicon-hydrogen bonds, it can increase the number of sites that react with double bonds, thereby increasing the cross-linking density. The viscosity of liquid silicone rubber is 3531-3875mPa·s, the tensile strength is 0.3057-0.7151MPa, the elongation at break is 116-259%, the hardness Shore D is 8-11, and the shear strength is 0.0859-0.1421MPa. Has good bonding strength and mechanical properties.

Detailed ways

The present invention will be described in detail below with reference to examples to facilitate those skilled in the art to understand the present invention. It is necessary to specifically point out here that the examples are only used to further illustrate the present invention and cannot be understood as limiting the protection scope of the present invention. Those skilled in the art can make non-essential improvements and modifications to the present invention based on the above-mentioned content of the invention. The adjustment should still fall within the protection scope of the present invention. At the same time, the raw materials mentioned below that are not described in detail are all commercially available products; the process steps or preparation methods that are not mentioned in detail are all process steps or preparation methods known to those skilled in the art.

Example 1

A preparation method of adhesion promoter, including the following steps:

(1) Mix 11.612g hydroxyethyl acrylate with 40mL cyclohexane and 0.01g p-hydroxyanisole, and stir at room temperature for 40 minutes to obtain a monomer solution;

(2) Mix 40g of hydrogen-containing MQ silicone resin with a hydrogen content of 0.5%, 80 mL of cyclohexane, and 0.1g of Karastedt catalyst with a concentration of 2000 ppm at 30°C to obtain a hydrogen-containing MQ silicone resin mixed solution;

(3) Within 30 minutes, add the monomer solution prepared in step (1) dropwise to the hydrogen-containing MQ silicone resin mixed solution prepared in step (2); raise the temperature to 70°C and react for 8 hours; cool to room temperature. Add activated carbon to adsorb the Karastedt catalyst, the adsorption time is 1 hour, filter and then spin-evaporate to remove the cyclohexane to obtain the adhesion promoter A of this embodiment.

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, 0.2 parts of adhesion promoter A, and 0.1 parts of Karastedt catalyst.

A method for preparing addition-type liquid silicone rubber, including the following steps:

Mix vinyl silicone oil with a viscosity of 2000cst and vinyl silicone oil with a viscosity of 300cst; then add white carbon black, hydrogen-containing silicone oil, 1-ethynylcyclohexanol, adhesion promoter A, and Karastedt catalyst to it, Mix evenly; perform vacuum degassing for 10 minutes; and finally cure at 140°C for 2 hours to obtain the addition liquid silicone rubber of this embodiment.

Example 2

A preparation method of adhesion promoter, including the following steps:

(1) Mix 14.117g N-acryloylmorpholine with 40mL toluene and 0.01g hydroquinone, and stir at room temperature for 40 minutes to obtain a monomer solution;

(2) Mix 50g of hydrogen-containing MQ silicone resin with a hydrogen content of 0.4%, 80 mL of toluene, and 0.1g of Karastedt catalyst with a concentration of 2000 ppm at 30°C to obtain a hydrogen-containing MQ silicone resin mixed solution;

(3) Within 30 minutes, add the monomer solution prepared in step (1) dropwise to the hydrogen-containing MQ silicone resin mixed solution prepared in step (2); raise the temperature to 80°C and react for 5 hours; cool to room temperature. Activated carbon is added to adsorb the Karastedt catalyst for 2 hours. After filtration, the toluene is removed by spin evaporation to obtain the adhesion accelerator B of this embodiment.

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, 0.5 parts of adhesion promoter B, and 0.1 parts of Karastedt catalyst.

The preparation method of the addition-type liquid silicone rubber of Example 2 is the same as that of Example 1.

Example 3

A preparation method of adhesion promoter, including the following steps:

(1) Mix 19.624g of 3,4-epoxycyclohexyl methacrylate with 40mL of toluene and 0.01g of p-hydroxyanisole, and stir at room temperature for 30 minutes to obtain a monomer solution;

(2) Reserve; mix 50g of hydrogen-containing MQ silicone resin with a hydrogen content of 0.4%, 80 mL of toluene, and 0.2g of Karastedt catalyst with a concentration of 2000 ppm at 40°C to obtain a hydrogen-containing MQ silicone resin mixed solution;

(3) Within 30 minutes, add the monomer solution prepared in step (1) dropwise to the hydrogen-containing MQ silicone resin mixed solution prepared in step (2); raise the temperature to 90°C and react for 2 hours; cool to room temperature. Activated carbon is added to adsorb the Karastedt catalyst for 2 hours. After filtration, the toluene is removed by spin evaporation to obtain the adhesion accelerator C of this embodiment.

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, 0.4 parts of adhesion promoter C, and 0.1 parts of Karastedt catalyst.

The preparation method of the addition-type liquid silicone rubber of Example 3 is the same as that of Example 1.

Example 4

A preparation method of adhesion promoter, including the following steps:

(1) Mix 9.812g of 3,4-epoxycyclohexyl methacrylate and 10.415g of isobornyl acrylate with 20mL of toluene and 0.005g of p-hydroxyanisole respectively, and stir at room temperature for 30 minutes to obtain a monomer solution;

(2) Mix 50g of hydrogen-containing MQ silicone resin with a hydrogen content of 0.4%, 80 mL of toluene, and 0.2g of Karastedt catalyst with a concentration of 2000 ppm at 40°C to obtain a hydrogen-containing MQ silicone resin mixed solution;

(3) Within 30 minutes, add the monomer solution prepared in step (1) dropwise to the hydrogen-containing MQ silicone resin mixed solution prepared in step (2); raise the temperature to 80°C and react for 3 hours; cool to room temperature. Activated carbon is added to adsorb the Karastedt catalyst for 2 hours. After filtration, the toluene is removed by spin evaporation to obtain the adhesion accelerator D of this embodiment.

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, 0.5 parts of adhesion promoter D, and 0.1 parts of Karastedt catalyst.

The preparation method of the addition-type liquid silicone rubber of Example 4 is the same as that of Example 1.

Example 5

A preparation method of adhesion promoter, including the following steps:

(1) Mix 5.806g hydroxyethyl acrylate and 10.415g isobornyl acrylate with 20mL cyclohexane and 0.005g p-hydroxyanisole respectively, and stir at room temperature for 30 minutes to obtain a monomer solution;

(2) Mix 40g of hydrogen-containing MQ silicone resin with a hydrogen content of 0.5%, 60 mL of cyclohexane, and 0.3 g of Karastedt catalyst with a concentration of 2000 ppm at 30°C to obtain a hydrogen-containing MQ silicone resin mixed solution;

(3) Within 30 minutes, add the monomer solution prepared in step (1) dropwise to the hydrogen-containing MQ silicone resin mixed solution prepared in step (2); raise the temperature to 70°C and react for 7 hours; cool to room temperature. Add activated carbon to adsorb the Karastedt catalyst, the adsorption time is 2 hours, filter and then spin-evaporate to remove cyclohexane to obtain the adhesion promoter E of this embodiment.

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, 0.5 parts of adhesion promoter E, and 0.1 parts of Karastedt catalyst.

The preparation method of the addition-type liquid silicone rubber of Example 5 is the same as that of Example 1.

Comparative example 1

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, and 0.1 parts of Karastedt catalyst.

The only difference between the addition-type liquid silicone rubber of Comparative Example 1 is that no adhesion promoter A was added in Comparative Example 1.

The preparation method of the addition-type liquid silicone rubber of Comparative Example 1 is the same as that of Example 1.

Comparative example 2

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, 0.2 parts of tackifier 731, and 0.1 parts of Karastedt catalyst.

The only difference between the addition-type liquid silicone rubber in Comparative Example 2 is that Comparative Example 2 uses an equivalent amount of commercially available tackifier 731 (a tackifier modified based on vinyl silicone oil) to replace the adhesion promoter A of Example 1.

The preparation method of the addition-type liquid silicone rubber of Comparative Example 2 is the same as that of Example 1.

Comparative example 3

An addition type liquid silicone rubber, its raw material components include by weight: 80 parts of vinyl silicone oil with a viscosity of 2000cst, 20 parts of vinyl silicone oil with a viscosity of 300cst, 7 parts of white carbon black, and a hydrogen content of 0.6% 1.067 parts of hydrogenated silicone oil, 0.01 parts of 1-ethynylcyclohexanol, 0.2 parts of tackifier 9200, and 0.1 parts of Karastedt catalyst.

The only difference between the addition-type liquid silicone rubber in Comparative Example 3 is that Comparative Example 3 uses an equivalent amount of commercially available tackifier 9200 (a tackifier modified based on hydrogen-containing silicone oil) to replace the adhesion promoter A of Example 1.

The preparation method of the addition-type liquid silicone rubber of Comparative Example 3 is the same as that of Example 1.

Performance Testing

The addition liquid silicone rubber samples prepared in Examples 1-5 and Comparative Examples 1-3 were tested for viscosity, tensile strength, elongation at break, hardness and shear strength. The specific test methods are as follows:

(1) Use a rotational viscometer to measure the viscosity of the sample in accordance with the GB/T 2794-1995 standard. Use the No. 4 rotor with a rotating speed of 60RPM.

(2) Use an electronic universal testing machine to measure the tensile strength and elongation at break of the sample in accordance with the GB/T 528-2009 standard. The tensile rate is 500mm/min.

(3) Use a hardness tester to measure the Shore D hardness of the sample in accordance with the GB/T 531.1-2008 standard.

(4) Use an electronic universal testing machine to measure the bonding tensile shear strength of the sample in accordance with the GB/T 13936-2014 standard. The tensile rate is 50mm/min.

The test results are shown in Table 1.

Table 1: Performance test results of addition liquid silicone rubber samples prepared in Examples 1-5 and Comparative Examples 1-3

sample Viscosity/mPa·s Tensile strength/MPa Elongation at break/% Hardness/Shore D Shear strength/MPa Example 1 3702 0.4131 183 11 0.1338 Example 2 3753 0.4063 179 11 0.1421 Example 3 3875 0.7151 259 10 0.1157 Example 4 3694 0.6414 155 9 0.1249 Example 5 3531 0.3057 116 8 0.0859 Comparative example 1 3524 0.2304 110 7 0.0246 Comparative example 2 3653 0.2457 108 7 0.0572 Comparative example 3 3713 0.3152 120 8 0.0348

It can be seen from Table 1 that the addition-type liquid silicone rubber prepared in Examples 1-5 has high viscosity and mechanical strength. The viscosity of the liquid silicone rubber is 3531-3875mPa·s, and the tensile strength is 0.3057-0.7151MPa. The elongation at break is 116-259%, the hardness Shore D is 8-11, and the shear strength is 0.0859-0.1421MPa. Since Comparative Examples 1-3 did not add a tackifier or added a commercially available ordinary tackifier, their viscosity, tensile strength, elongation at break, hardness and shear strength were all significantly reduced compared to Example 1.

For those of ordinary skill in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention without having to go through creative work. Therefore, simple improvements made by those skilled in the art to the present invention based on the disclosure of the present invention should be within the protection scope of the present invention. The above-mentioned embodiments are preferred embodiments of the present invention. All processes similar to those of the present invention and equivalent changes should fall within the protection scope of the present invention.

Claims (10)

1. A preparation method of adhesion promoter, characterized in that it includes the following steps: Mix acrylic monomer with solvent and polymerization inhibitor to obtain monomer solution; Mix hydrogen-containing MQ silicone resin with solvent and catalyst to obtain hydrogen-containing MQ silicone resin mixed solution; The monomer solution is added dropwise into the hydrogen-containing MQ silicone resin mixed solution, and the temperature is raised to react; after cooling, an adsorbent is added to adsorb the catalyst, and after filtration, the solvent is removed to obtain the adhesion accelerator. 2. The preparation method of adhesion promoter according to claim 1, characterized in that the acrylic monomer is selected from the group consisting of hydroxyethyl acrylate, N-acryloylmorpholine, isobornyl acrylate, and tetrahydrofuran acrylate, Glycidyl acrylate, one or two of the 3,4-epoxycyclohexyl methacrylate monomers. 3. The preparation method of adhesion promoter according to claim 1, characterized in that the polymerization inhibitor is selected from the group consisting of p-hydroxyanisole, hydroquinone, p-tert-butylcatechol, and p-benzoquinone. At least one of; and/or, the solvent is selected from at least one of toluene, isopropyl alcohol, cyclohexane, and ethyl acetate. 4. The preparation method of adhesion promoter according to claim 1, characterized in that, the catalyst is a Karastedt catalyst; and/or, the concentration of the catalyst in the reaction system is 1-6 ppm; and/or, The adsorbent is activated carbon; the addition amount of the adsorbent accounts for 5-15wt% of the reaction system. 5. The preparation method of adhesion promoter according to claim 1, characterized in that the hydrogen content of the hydrogen-containing MQ silicone resin is 0.4-0.9%; and/or, the hydrogen-containing MQ silicone resin and The molar ratio of the acrylic monomer is 1: (0.3-0.8); and/or the polymerization inhibitor accounts for 0.2-0.8% of the mass of the acrylic monomer. 6. The preparation method of adhesion promoter according to any one of claims 1 to 5, characterized in that the hydrogen-containing MQ silicone resin is mixed with a solvent and a catalyst at 30-50°C; and/or, the The reaction temperature is 50-90°C; and/or the reaction time is 1-6 hours; the adsorbent adsorption time is 1-2 hours. 7. An adhesion promoter, characterized in that it is prepared by the preparation method according to any one of claims 1 to 6. 8. An addition-type liquid silicone rubber, characterized in that its raw material components include the adhesion promoter according to claim 7. 9. The addition type liquid silicone rubber according to claim 8, characterized in that the raw material components further include vinyl silicone oil, hydrogen-containing silicone oil, fillers, inhibitors and catalysts; the raw material components are calculated in parts by weight. Including: 100 parts of vinyl silicone oil, 2-20 parts of hydrogenated silicone oil, 5-50 parts of fillers, 0.2-5 parts of adhesion accelerator, 0.001-0.05 parts of inhibitors, and 0.05-0.5 parts of catalyst. 10. A preparation method of addition-type liquid silicone rubber as claimed in claim 8 or 9, characterized in that it includes the following steps: After mixing each raw material, degassing and solidifying, the addition liquid silicone rubber is obtained.